<template>
  <header class="header">
    <h1>todos</h1>
    <input id="toggle-all" class="toggle-all" type="checkbox" v-model="isAll"/>
    <label for="toggle-all"></label>
    <input class="new-todo" placeholder="输入任务名称-回车确认" autofocus v-model.trim="content" @keyup.enter="add"/>
  </header>
</template>

<script>
export default {
  props:{
    arr:{
      type:Array
    }
  },
  data(){
    return {
      content:''
    }
  },
  methods: {
    add(){
      if(this.content.length===0){
        return
      }
      this.$emit('add',this.content)
      this.content=''
    }
  },
  computed:{
    isAll:{
      get(){
        return this.arr.every(item=>item.isDone)
      },
      set(val){
        this.arr.forEach(item=>item.isDone=val)
      }
    }
  }
};
</script>
